Smok Nord 4 Review: Bigger, But Is It Actually Better? What's the Difference Between Smok Nord 4 and Smok Nord X? SMOK NORD 4 Empty Refillable Replacement Pods [Pack of 3] Designed for RPM Coils, Compatible with the entire Series, Such as 0.4Mesh 0.6Triple, Press Fit, Side Fill Leak Proof, No Nicotine: Amazon.co.uk: SMOK NORD 4 Empty Refillable Replacement Pods [Pack of 3] Designed for RPM2 Coils, Compatible with the entire Series, Such as 0.16Mesh 0.6DC, Press Fit, Side Fill Leak Proof, No Nicotine: Amazon.co.uk: