Installation systems 347 Spare parts for Duplo products using these command plates: DUPLO Pro UR System A890094000 3 8 x 70 1010 2 19 17 20 21 29 22 A DN 50 Code Code 2 AV0011800R 20 AV0002300R 3 AV0001900R 21 AV0002000R 17 AV0002100R 22 AV0002400R A=50 19 AV0002200R 29 AV0004900R