Wieland fasis greyblue partitions twfn for wfkn 2541016 terminal blocks wieland 0731291550 this grey fasis terminal block partition twfn 4 d22 from wieland can be easily attached via the snap in feature and has a thickness of 15mm for use with the following din rail terminal blocksfasiswkfn 4 fsifusewkfn 4 d2235duo feed throughwkfn 4 tkg with thsi 5 x 20disconnectwkfn 4 tkg with thsi 63 x 32disconnectwkfn 4 tkg with sistdisconnectwkfn 4 tkg with distdisconnect