This is a Masterflex 77252-72 L/S High-Performance Pump Head New in Packaging.

What you will get:

• Masterflex 77252-72 L/S High-Performance Pump Head New in Packaging Consisting of:
  • Masterflex 77252-72 L/S High-Performance Pump Head
  • Mounting Plate
  • four (4) #8-32 PFHS (Phillips Flat Head Screw)
  • four (4) #10-32 PPHS (Phillips Pan Head Screw)
  • Instructions

This is my item P112 B3 S5 N/D 2703-2708.  6 were available at listing time.  Avantor sells these for $766 each.

Check out my other items where I have a lot of other scientific equipment and accessories for sale.

More Information:

The MASTERFLEX® L/S® High-Performance Pump Head delivers in excess of 3 L/min flow at normal MASTERFLEX operating speeds and pressures. It is designed for optimal pumping in the clockwise direction. There are two mounting positions. Tubing entry and exit are either on the left side or right side of the pump when mounted on a MASTERFLEX L/S Drive. The pump will operate with any MASTERFLEX L/S drive with 180 oz-in (13 kg·cm) or more output torque.

All-new patented design offers faster tubing changes and improved ergonomics. Tubing occlusion is automatic and optimized when pump head is closed and latched – load tubing in 15 seconds or less Flow rates up to 3400 ml/min—flow rate depends on drive rpm, pump head, and tubing size Pressure up to 150 psi (10.3 bar) with L/S high-pressure (HP) pump tubing Reinforced nylon housing and occlusion bed with stainless steel rotor/roller assembly Compatible with all 1/10 hp L/S drives that accept two or more pump heads Compact design for efficient use of space The L/S® High-Performance pump heads offer better suction lift, viscous fluid transfer, and longer tubing life. Tubing enters and exits the same side of the pump head for easy connection to tubing inlet and outlet. Heads are not compatible with the 07554-series L/S Economy Console drives.

• Maximum Flow Rate: 3400 ml/min
• Description: L/S High-Performance Head for L/S High-Performance tubing, 3400 ml/min max flow
• Height: 101 mm (4")
• Length: 69 mm (2.75")
• Cat. No.: MFLX77252-72
• Rollers: 3
• Rotor Material: Stainless steel
• Width: 146 mm (5.75")
• Housing material: Glass-filled nylon PA
• Occlusion: Fixed
• Open-head sensor: No
• Volume per revolution with L/S 24 tubing: 3 ml
• Volume per revolution with L/S 15 tubing:  1.8 ml
• Tubing retention: Manual
• Volume per revolution with L/S 36 tubing: 5.8 ml
• Volume per revolution with L/S 35 tubing: 4.3 ml
• Pump series: L/S
• Suction lift: 8.8 m (29 ft.)
• Model: 77252-72
• Optimum RPM range: 0.02 - 600 rpm
• Tubing sizes accepted: L/S® 15, L/S 24, L/S 35, L/S 36, L/S 14HP, L/S 16HP, L/S 15HP, L/S 24HP
• No. of Channels: 1
• Gear ratio: 1:1
• Nominal torque load—Running: up to 180 oz-in (13 kg•cm)
  Construction Dimensions (W × H × D):
  Operating: 5.75 in × 4.0 in × 2.75 in (146 mm × 101 mm × 69 mm)
  Open: 6.5 in × 4.0 in × 6.5 in (165 mm × 101 mm × 165 mm)
  Weight: 2.1 lb (0.96 kg)
  Housing materials: Stainless steel (SS), TECHNYL STAR S 216 V30
  Glass filled Nylon Roller/bearing materials: Stainless Steel (SS) / Sealed Stainless Steel
  Rotor materials: Stainless Steel (SS)
  Environment Operating Temperature: 32°F to 104°F (0°C to 40°C)
  Storage Temperature: -40°F to 149°F ( -40°C to 65°C)
  Humidity: 5% to 95% (non-condensing)
  Noise level: <70 dba
  Compliance: EN809 (EU Machinery Directive) (for CE mark) (ATEX) ISO 80079-36 ISO/IEC 80079-37