MAIN BLADE COMPATIBLE FOR BIOTRILLER FOR LESCHA MODELS : ZAK JUNIOR , SUPER ZAK , ZAK 2700 MODEL - TECHNICAL SPECIFICATIONS LENGTH 85 mm WIDTH 28.5 mm HOLE DIAMETER 7.2 cm CENTRAL HOLE INTERAXIS 27.5 mm ORIGINAL CODE: 13270833 ORIGINAL CODE 52534 , 56787 , 53236 SR