6 H0 standard Snap in loop couplers  fits Märklin, Roco, Piko Rare Style i have not seen this style before maybe European style. See pictures for compatibility Nos NEW OLD STOCK SEE PICTURES.  I DONT USUALLY GET THESE IN SO DON'T WAIT BUY NOW . ALL OFFERS CONSIDERED COMBINED SHIPPING AVAILABLE ALL ITEMS BOX SHIPPED. TB131 #8019