various of hollow pin chains we can supply various of holloe pin chains: short pitch series,double pitch series,long pitch series and special hollow pin chain .Design and produce as per clients' requirement. 40HP,50HP,60HP,80HP,08BHP,10BHP,12BHP,16BHP,2040HP,2050HP,C2040HP,C2050HP...... double pitch hollow pin chain(straight side plate)