New Old Stock Quicksilver Mercury Marine Spark Plug Extension Kit. Part number 91-877870A1. Great condition. In original package. Package has shelf wear. 

Fits:

240 EFI M2 JET DRIVE - 240 EFI M2 JET DRIVE (PUMP)210 CARB M2 JET DRIVE - 210 CARB M2 JET DRIVE (PUMP)
200 DFI M2 JET DRIVE - 200 DFI M2 JET DRIVE (PUMP)250 DFI AND 250 DFI M2 JET DRIVE - 250 DFI JET DRIVE (POWERHEAD)
250 DFI AND 250 DFI M2 JET DRIVE - 250 DFI M2 JET DRIVE (PUMP)240 EFI AND 240 EFI M2 JET DRIVE - 240 EFI M2 JET DRIVE (PUMP)
210 CARB JET DRIVE - 210 CARB JET DRIVE (POWERHEAD)200 DFI JET DRIVE - 200 DFI JET DRIVE (POWERHEAD)
200 DFI JET DRIVE - 200 DFI M2 JET DRIVE (PUMP)240 EFI AND 240 EFI M2 JET DRIVE - 240 EFI JET DRIVE (POWERHEAD)
200 DFI M2 JET DRIVE - 200 DFI M2 JET DRIVE (POWERHEAD)210 CARB M2 JET DRIVE - 210 CARB M2 JET DRIVE (POWERHEAD)
240 EFI JET DRIVE - 240 EFI JET DRIVE (PUMP)210 CARB JET DRIVE - 210 CARB JET DRIVE (PUMP)
240 EFI JET DRIVE - 240 EFI JET DRIVE (POWERHEAD)200 DFI JET DRIVE - 200 DFI JET DRIVE (PUMP)
240 EFI M2 JET DRIVE - 240 EFI M2 JET DRIVE (POWERHEAD)240 EFI M2 JET DRIVE - 240 EFI M2 JET DRIVE (POWER