Concave Cultivation Discs and Hubs Concave Discs 12″ x 4 Plain Concave RCH 45-5RH 7 on PCD 96 D12/3172 13″ Massey Plain Concave OEM : 873692M1 D13/3363 13″ Massey Plain Concave OEM : 1659504M D13/3064 13″ x 2.5 Concave Plain D13/2287 16″ x 4 Plain Concave RCH 60 – 3RH 9 on PCD 81 D16/2781 18″ x 3.25 Plain Concave RCH 35 – 4RH 12.5 on PCD 100 D18/3476 18″ x 4 Plain Concave 6RH 12.5 on PCD 100 D18/3916 20″ x 6 Plain Concave Parmiter RCH 32 3RH 9 on PCD 114 D20/2770 16″ x 4 C/A Concave RCH 32 – 3RH 9 on PCD 114 D20/3030 20″ x 5 C/A to fit Vaderstad 170097 RCH 32 – 3RH 9 on PCD 114 D20/4244 20″ x 5 C/A Concave 4RH 12.5 on PCD 98 D20/4303 24″ x 8 C/A to fit Simba 4RH 12.5 on PCD 98 D24/4107 4 Hole Agrihub Fits D20/4303 DH/3995 Boutmarker Hub (weld on) Fits D18/3476 DH/1833
