BLADE HOLDER HUB FOR STIHL LAWN TRACTOR LAWN MOWERS : RT4082.0 , RT4097.0S , RT4097.0 SX , RT4112.0S , RT4112.0SZ , RT5097.0 , RT5097.0 C , RT5097.0 Z , RT5112.0 Z , RT6112.0C , RT6112.0ZL , RT6127. 0ZL VIKING : MT4097 , MT5097 , MT6112 MODEL - TECHNICAL CHARACTERISTICS SHAFT DIAMETER 25.4 mm HEIGHT 25 mm INSERTION DEPTH 25 mm PULLEY DIAMETER - mm CODE: 13289857 ORIGINAL CODE 6170 702 3800 SR