Results of 1D simulations of an accretion disc with an embedded planet whose torque on the gas is based on the parametrisations of D’Angelo & Lubow (2010). Top panel: equilibrium relative gap height as a function of the planetary mass for three values of the viscous α_v. The dashed lines mark the 50% relative gap height and the 85% relative gap height, the latter approximately corresponding to the pebble isolation mass. The dotted lines show the measuredpebble isolation mass and 50% gap mass. Bottom panel: pebble isolation mass (M_iso) and the gap transition mass (M_gap) as a functionof α_v. We find generally that M_gap ≈ 2.3M_iso. The measured gap transition mass corresponds well to the 2D simulations of Kanagawa et al. (2018), while the measured pebble isolation mass is about a factor two lower than reported in Bitsch et al. (2018b) and displays a more consistent drop with lower α_v.